Locomotive valve



Sept. 8, 1931. V sc 1,822,171

LOCOMOTIVE VALVE Filed Dec. 20. 1929 2 Sheets-Sheet l Sept. 8, 1931. P.EASCALE 1,822,171

LOCOMOTI VE VALVE Filed Dec. 20. 1929 2 Sheets-Sheet 2 Patented Sept. 8,1931 V UNITED STATES PATENT OFFICE,

PASQUALE PASCALE, OF NEW YbRK, N. Y., ASSIGNOR T BRIE-STEAM VALVECORPORA TION, A CORPORATION OF DELAWARE i LOGOMOTIVE VALVE 7 Applicationfiled December 20, 1929. Serial No. 415,475

This invention relates to a locomotive valve.

In my Patent Number 1,647,465, of November 1, 1927, there is involved avalve, 6 using the same principles as the present one and the valvereferred to is very eflicient in operation, serving, in accordance withthe objects and purposes therein stated, to efficiently dry the steambefore it passes to the place where its power is utilized.

In the patent referred to there is shown and described a balanced stopvalve combined with means for drying the steam, the

drying means including elements termed a turbine, consisting of anannular cage entirely surrounding the valve body, and made up ofnumerous vanes, through which the steam must pass, the vanes being sospaced as to form numerous narrow passages between them, the passagesbeing of such width that the steam will be denuded initially of pointwhere it passes through the second element, which is termedthe steamdrier, and

35 which consists of a hollow cylinder provided, throughout the greaterpart of its surface, with small perforations or nozzles through whichthe steam finally passes in entering the -valve body, the perforationsacting to further denude the steam of moisture and to deliver it insubstantially dry condition to the place of utilization, or tosuperheaters or the like, that may intervene between the valve and thepoint of use.

The object of this invention is to improve on my former valve by theprovision of a construction that even more efliciently dries the steamand to this end, the invention consists in the main, and in a broadsense, in interrupting the flow of steam from the turbine to the steamdrier or perforated cylinder or sleeve, by the interposition of abarrier or diaphragm between these elements that prevents the incomingsteam from being brought directly into contact with the drier, thebarrier or diaphragm, together with the outer wall of the casing and thevalve body, forming multiple conduits communicating with each other,there being also'provided, means whereby the water extracted from thesteam is quickly andconveniently led back into the boiler. There isprovided in the present construction, as in the construction shown. anddescribed in my Patent Number 1,710,-

946, April 30, 1929, means for balancing the valve.

A further object of the invention is to so locate the steam drier withrelation tothe valve body that the steam willpass through the drierbefore entering the ports in said body, thus facilitating the quickreturn to the boiler of the moisture in highly heated'c0n-.

dition.

' In the drawings illustrating the invention, Figure 1 is an elevationof the valve with so much thereof in section as is necessary to show theinternal construct-ion.

Figure 2 is a sectiontaken about on line a'a of Figure l. a

Figure 3' is an elevation partly in section .of the lower portion of thevalve structure, much of its moisture before reaching the I and Figuretis a fragmentary section showing the arrangement of the vanes or theturbine ring.

Referring to the drawings, the numeral 1 designates the outlet pipecasting designed for connection with a superheater or other means forconducting the steam to the point where it is utilized. This casting isprovided in the present instance with a drainage chamber 2, which may bein turn provided with a fitting or fittings3 through Which the waterextracted from the steam is returned to the boiler.

The numeral 4 designates the valve body formed at its lower end with anannular flange 5 having a similarly shaped opening 6 therein, extendingentirely around the body, the purpose of which will presently becomeapparent. The body 4 is surrounded by an annulus 7 having formed at itsupperouter edge, the beveled valve seat 8. The body is provided with anumber of ports-9, through whichsteam passes into the body. The body isprovided at its upper end with a head 10 having a dome-shaped centralportion 11 to receive the pilot or relief valve which will be presentlydescribed.

' The numeral 12 designates what I term the steam drier. This isconstituted by a sleeve or cylinder having an inturned flange 13 at itsupper end adapted to rest upon an annular ledge or rabbet 14 in the headof the valve body and securely held therein by a ring 14 secured to thehead by bolts 15, the ring 1 1' being provided with upwardly anddownwardly extending flanges 16 provided at in tervals with annulargrooves 17 for the reception of suitable packing rings 18, the part justdescribed being the equivalent of the means shown and described in myPatent Number 1,7 10,9 3, of April 30, 1921, wherein said meanscooperates, by reason of certain proportional dimensions, of the valveseat and valve, to aid in balancing the valve.

The numeral 19 designates the valve to which is secured by bolts 20, thehead 21, provided with a central boss 22 for the reception of the pilotvalve The valve 19 'envelops, when closed, the greater portion of thevalve body, and obviously is slidab'le thereon, and its lower edge isshaped to conform to the valve seat 8 on the annulus 9. Surrounding thevalve and valve body is an outer casing 24, and an inner diaphragm orcasing 25, spaced apart as shown, so as to provide two annular chambers,an outer chamber 26 and an inner chamber 27, which form conduits throughwhich the steam enters before reaching the interior of the valve.Surrounding the valve and forming a part of the outer conduit andcommunicating with the chamber 26, is a turbine or cage 28, which isformed as a part of the upper casing section 29, which is suitablysecured to the lower easing section 30, and to a flanged ring 31 at thetop of the structure. This turbine is constituted by a ring 32 havingformed integral therewith, numerous vanes 33, so spaced as to formnumerous narrow passages through which steam must pass before passinginto the chamber 26, the bottom of the turbine or ring 32 being providedwith an opening communicating with the said chamber 26. Preferably thepassages between the vanes of the turbine are arranged tangential to theaxis of the valve and the turbine, as a whole, is preferably made up ofa number of sec tions with the angles of the vanes in differentdirections, the sections being in alternate arrangement.

The lower ends of the chamber 26 .and 27 are open and in communication,and they are also in communication with the drainage opening 6 of thevalve body.

Braces 34f. are provided at intervals around the structure for thepurpose of firmly securing the walls 24 and 25 together, and similarbraces 3d are provided between the upper end of the wall 25 and theupper part of the casing for further stabilizing and bracing theseparts. These braces, it will be understood, are arranged at intervalsand do not close communication between the turbine and the inner chamber27 The cylinder or steam drier 12 is provided with numerous smallopenings 36 constituting nozzles and aside from the location of thisdrier relative to the ports in the valve body, its construction does notdiffer materially from similar elements appearing in my patents hereinmentioned.

The pilot or relief valve 23 comprises a stem 37 into which is threadeda shank 38 provided with a head 39 at its lower end. Secured to theupper end of the stem by a pin -10, are cross bars 41, having suitableconnection with the usual operating levers partially shown in dottedlines, whereby the valve is lifted in the initial movement of theoperation of the valve to permit steam to flow in through the valve tofill the space between the head of the valve body and the valve head 21.It will be noted that the valve stem is provided, just below its seat42, with an annular recess d3, which recess communieates with the spacebetween said heads by means of grooves l l, so that when the stem islifted, and the valve leaves its seat, steam will flow in the annularrecess and through the grooves to its destination, the extent to whichthe valve may be opened, depending upon the amount of movement the stemcan have according to the adjustment of the head 39 with relation to thebottom of the boss 22.

In operation, assuming that there is an opening movement of the valve,steam passes through the vanes of the turbine in the first conduit orchamber 26, and its forceful impingement with the surfaces of the vanesand againstthe diaphragm 25, will denude the steam of much of itsmoisture or water, which, gathering outside of the wall, will out of thebottom of this conduit in the drainage chamber, and the steam, in itsthus improved condition, passes into the valve body through theperforations or nozzles 36 in the steam drier l2, reaching the interiorof the body in substantially dry condition. The moisture wrung from thesteam by passing through the drier, condenses on the face of the drier,and flows back into the drainage chamber, through the openings 6.

From the foregoing, it will be seen that by the interposition of thediaphragm or barrier 25, between the outer wall of the casing and thevalve body, the steam is prevented from coming directly into contactwith the steam drier, as was the case in my patents above referred to.

Vhat I claim is:

1. In a locomotive valve, in combination, a hollow ported body closed atits top and provided with an annular valve seat, a valve slidablelongitudinally of the body to cover and uncover said ports, and adaptedto seat on said seat, multiple casing surrounding the body and f0 *minginner and outer conduits communicating with the ports in the body whenthe valve is open, means at the entrance of the outer conduit fordenuding the steam of moisture and means located at the entrance of theports to further dry the steam.

2. In a locomotive valve, in combination, a hollow ported body, closedat its top and provided with an annular valve seat, a valve slidablelongitudinally of the body to cover and uncover said ports, and adaptedto seat on said seat, a multiple casing surrounding the bed and forminginner and outer conduits communicating with said ports in the body whenthe valve is open, means located at the entrance of the ports for dryingthe steam.

3. In a locomotive valve, in combination, a hollow ported body closed atits top, and provided with an annular valve seat, and a valve slidablelongitudinally of the body to cover and uncover said ports, and adaptedto seat on the seat, means located at he entrance of the ports in saidbody, comprising a cylinder provided with numerous small holes thereinconstituting nozzles, a casing surrounding the valve and valve body andhaving steam inlet openings therein, and a diaphragm or barrierinterposes between the outer wall of the casing and said valve body, andforming with said valve body, a conduit open at its upper end for thedownward passage of the steam to the ports in the valve body.

4. In a locomotive valve, in combination, a hollow ported body closed atits top and provided with an annular valve seat, a valve slidablelongitudinally of the body to cover and uncover said ports and adaptedto seat on said seat, a multiple wall casing surrounding said body,there being a steam inlet opening in the outer casing, the inner wallforming, together with the outer wall and valve body, a plurality orsteam conduits, said conduits communicating with each other, the innerwall of the casing serving as a barrier to prevent the steam frompassing directly into the valve body for the purpose set forth,

means located opposite the ports in the valve body, to dry the steam,and means for draining back into the boiler, the moisture eX- tractedfrom the steam.

5. In a locomotive valve, in combination, a hollow ported body closed atits top and provided with an annular valve seat, a valve slidablelongitudinally of the body to cover and uncover said ports and adaptedto seat on said seat, a multiple casing surrounding the body and forminginner and outer conduits communicating with the ports in the body, whenthe valve is open, a turbine, surrounding the outer part of the casingand constituted by numerous vanes spaced apart to form narrow steampassages, said cage communicating with said conduits, a cylinder orsleeve provided with numerous small perforatlons constituting nozzlesand located at the entrance of the ports in the valve body conduits,said conduits being open at their lower ends to permit drainage ofmoisture extracted from the steam, a drainage chamber below the casingand communicating with the conduits, means for admitting and dryingsteam as it enters the first conduit, and means for further drying thesteam as it passes into the valvebody.

In testimony whereof I atfix my signature.

PASQUALE PASCALE.

